Cutoff Date for Fertilizing Lawns is December 1
If you plan to fertilize your lawn this fall, remember that it is against New York State law to fertilize lawns between December 1 and April 1. Some areas also have local laws about selling and using lawn fertilizers (e.g., Suffolk County prohibits the application of lawn fertilizers after November 1).
Visit DEC’s Lawn Fertilizer webpage for more information. The law does not apply to agricultural fertilizer or fertilizer for gardens.
Choose a lawn fertilizer with no phosphorus.
Lawn fertilizer can have unnecessary phosphorus that runs into water bodies. Excess phosphorus in freshwater lakes and ponds can cause algae overgrowth, with serious impacts to the environment and public health.